Rinnai I Series, Installation And Operation Manual

Page: 88 / 136

88 Rinnai I - Series Condensing Boiler Combi Manual
46
The Differential Temperature from Ceasing Fire
to Firing Again
Normal Quick
How much temperature drop is permitted by
the supply water thermistor before the boiler
will fire again.
When selecting "Quick", the boiler will fire more
frequently and achieve more temperature
control.
CH Setting Temperature Temperature Drop
168 - 182°F (75 - 82°C) 27°F (15°C) 15°F (8°C)
104 - 166°F (40 - 74°C) 15°F (8°C) 9°F (5°C)
47
The Time Which the Boiler is not Allowed to Fire
Again for CH
Normal
(3 Minutes)
Quick
(10 Seconds)
This selects the time which the boiler will not be
able to fire again for CH after the burner has
shutdown. This setting is to prevent frequent
ON/OFF operation.
49
Will the boiler shut down on a high return water
temperature
Yes No
This setting is for whether the boiler will shut
down at high return water temperatures. This is
to decrease the off cycle time even though the
return water temperature is warm.
60
Not Available
Not Available
A0
Gas Type
Natural
Gas
Liquid
Propane
For selecting gas type when conducting gas
conversion.
A1
Not Available
Not Available
A2
Vent Material Used
PVC
Material
other than
PVC:
CPVC/PP/
Other
This selects the venting material used. The
boiler is set from the factory to be installed in a
PVC venting system. If CPVC, PP, or other
approved venting is used, this may be adjusted.
See section
“5.4 PVC Venting Safety Switch ” for
more information.
45
Freeze Protection Level
Default
When Boiler
is Installed in
a Warm
Room
This selects the freeze protection level.
Selecting “ B ” will prevent the boiler from
operating in freeze protection mode more than
believed necessary.
Parameter
Number
Setting Description
Selection
A b C d
44
External Pump Runs When Freeze Protection is
in Operation
Does Not
Run
Same as Main
Pump
This selects how the external pump operates
when freeze protection is in operation. This se-
lects whether the pump will run to reduce the
pumps operation time or operating the same as
the main pump to enable the boiler to deliver
the remaining heat to the system. The tempera-
ture water being delivered to the system may
not be as warm as desired with this setting ON.
Note: If “ Same as Main Pump ” is selected, hy-
draulic separation is needed.